Possible Causes - Scan Tool Does Not Communicate With Can C (Hub Bus Style)
WARNING: This page is about a different car, the 2016 Dodge Journey and 2015 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.
This diagnostic will not have Diagnostic Trouble Codes to assist in determining no scan tool communication with the vehicle.
Default Actions:
- Vehicle may start and run.
- Wipers and Headlights may be on automatically during an ignition cycle when communication is in default mode.
| Possible Causes |
|---|
| FAULTY SCAN TOOL |
| DATA LINK CONNECTOR |
| DATA LINK CONNECTOR FUSED B (+) CIRCUIT OPEN OR HIGH RESISTANCE |
| DATA LINK CONNECTOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE |
| CAN C (+) BUS CIRCUIT OPEN, SHORTED OR HIGH RESISTANCE |
| CAN C (-) BUS CIRCUIT OPEN, SHORTED OR HIGH RESISTANCE |
| POOR CONNECTION |
| STAR CONNECTOR |
| ANY MODULE ON THE CAN C BUS |
NORMAL CAN CIRCUIT VOLTAGE TABLE
| CIRCUIT | NORMAL VOLTAGE VALUES |
|---|---|
| CAN C (-) | 1.5 - 2.5 volts |
| CAN C (+) | 2.5 - 3.5 volts |
| Difference Between CAN C (+) and CAN C (-) | 0.5 volt |